Ken Condon's stable star Success Days faces a spell on the sidelines after X-rays revealed he suffered a stress fracture in the Ivestec Derby.
Runaway winner of the Ballysax Stakes and Derrinstown Stud Derby Trial, the grey was added to the field for the Epsom Classic at a cost of £75,000 but finished last of the 12 runners.
Condon reported his charge had come back sore in the immediate aftermath, and further examinations revealed the injury blow.
Condon said: "He pulled up sore on Derby day, we carried out further investigations on Monday and Tuesday and an X-ray has revealed he sustained a stress fracture to a near-fore limb."
Condon is, however, hopeful the son of Jeremy, who has won four of his seven starts, will be back later in the year.
He added: "He'll have another X-ray next Monday and the prognosis is good, hopefully we will still have him back for an autumn campaign."